In the food fight scene, after Cry Baby hides behind the counter with her friends, a boy with blue hair is seen. When the film cuts to a wider shot, he vanishes, and then later reappears.
The cut on Cry Baby's arm from "Show & Tell" does not reappear in "Nurse's Office", despite the scene taking place directly after.
In "Class Fight", before the second verse, Brandon can be seen sitting with Cry Baby and Angelita in the background although he hadn't yet sat with them at that point.
When Angelita and Cry Baby get off the bus, Cry Baby is on the left and Angelita is on the right. However, when the angle changes, they have switched positions.
During Lunchbox Friends, Cry Baby knocks a tray off a table with her foot. However, when the scene cuts back to the table, the tray is not on the floor.
(at 1:05:24) Stains from the fake blood used in previous takes can be briefly seen on Angelita's skirt.
When "Wheels on the Bus" begins, a cameraman can be seen in a bus window.
It is unknown who ran K-12 in the time between the principal's death and Leo taking over.
At the beginning of "Show & Tell", one of Cry Baby's female classmates raises her head twice: first when the door first opens, then in sync with the rest of the students.
In Nurse's Office, when Lilith appears and the nurses turn around, one of the nurses on the right has her hands in the front, while the rest have their hands behind their backs. When Lilith makes the nurses pass out, the same nurse quickly puts her hands behind her back.